Study on the distribution characteristics of deep hole blasting in the fan-shaped hole of Shilu Iron Mine

被引：0
|
作者：
Luo H. [1 ]
Yang R. [2 ]
Ma X. [1 ]
Yang G. [1 ]
Zhu P. [1 ]
Feng W. [1 ]
机构：
[1] School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing
[2] School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2023年 / 40卷 / 02期
关键词：
blasting block degree; bulk rate; fine ore rate; fractal dimension; GGS model;
D O I：
10.13545/j.cnki.jmse.2022.0159
中图分类号：
学科分类号：
摘要：
In order to optimize the blasting block degree distribution of fan-shaped medium and deep holes, nine field tests of fan-shaped hole blasting are carried out. The digital image processing software Split-Desk 4. 0 is used to process the image of the blasting pile, and the blasting block degree is obtained by linear fitting. The distribution prediction model and the fractal dimension of the corresponding explosion piles are calculated. The test results show that the differential blasting is beneficial to control the bulk rate, and the interval charging of the fan-shaped orifice is beneficial to reduce the blasting powder rate of medium and deep holes. The numerical simulation results show that the effective peak stress at the bottom of the hole < the effective peak stress in the middle < the effective peak stress at the orifice. It is easy to generate boulders at the bottom of the hole and powder ore at the orifice. By adjusting the reasonable delay time between holes in medium and deep hole blasting and the charge structure of the fan-shaped hole, the size distribution of medium and deep hole blasting can be effectively controlled, which is beneficial to improve the production efficiency of Shilu Iron Mine and indirectly improve its economic performance. © 2023 China University of Mining and Technology. All rights reserved.
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页码：371 / 378
页数：7
相关论文
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